Years ago when Inuyasha
was first running on Toonami, and it struck me that some of the series' music reminded me of Akira Ifukube's work. Unfortunately at the time I did not look further into who the composer was; until today.
So, a quick search brings up Kaoru Wada, and imagine my surprise when the beginning of the Wikipedia article mentions that Wada was an apprentice of Akira Ifukube. I don't think I've seen anything else Wada has composed for besides Samurai 7
and Casshern Sins
(and some work on Kingdom Hearts 1 & 2, though it appears he wasn't the primary composer on the games).
Wada has a long list of credits check them out on the Wiki article on him. http://en.wikipedia.org/wiki/Kaoru_Wada
Edit: dug up some Youtube videos for listening.
From Inuyasha, Sesshomaru's theme (this may have been the one that made me think of Ifukube's work)https://youtu.be/qshbykNzjJ4